import CodeMirror from "codemirror/lib/codemirror";
(function () {
    CodeMirror.extendMode("css", {
        commentStart: "/*",
        commentEnd: "*/",
        newlineAfterToken: function (type, content) {
            return /^[;{}]$/.test(content);
        },
    });

    // Comment/uncomment the specified range
    CodeMirror.defineExtension("commentRange", function (isComment, from, to) {
        var cm = this;
        var curMode = CodeMirror.innerMode(
            cm.getMode(),
            cm.getTokenAt(from).state
        ).mode;
        cm.operation(function () {
            if (isComment) {
                // Comment range
                cm.replaceRange(curMode.commentEnd, to);
                cm.replaceRange(curMode.commentStart, from);
                if (from.line == to.line && from.ch == to.ch) {
                    // An empty comment inserted - put cursor inside
                    cm.setCursor(
                        from.line,
                        from.ch + curMode.commentStart.length
                    );
                }
            } else {
                // Uncomment range
                var selText = cm.getRange(from, to);
                var startIndex = selText.indexOf(curMode.commentStart);
                var endIndex = selText.lastIndexOf(curMode.commentEnd);
                if (startIndex > -1 && endIndex > -1 && endIndex > startIndex) {
                    // Take string till comment start
                    selText =
                        selText.substr(0, startIndex) +
                        // From comment start till comment end
                        selText.substring(
                            startIndex + curMode.commentStart.length,
                            endIndex
                        ) +
                        // From comment end till string end
                        selText.substr(endIndex + curMode.commentEnd.length);
                }
                cm.replaceRange(selText, from, to);
            }
        });
    });

    // Applies automatic mode-aware indentation to the specified range
    CodeMirror.defineExtension("autoIndentRange", function (from, to) {
        var cmInstance = this;
        this.operation(function () {
            for (var i = from.line; i <= to.line; i++) {
                cmInstance.indentLine(i, "smart");
            }
        });
    });

    // Applies automatic formatting to the specified range
    CodeMirror.defineExtension("autoFormatRange", function (from, to) {
        var cm = this;
        var outer = cm.getMode();
        var text = cm.getRange(from, to).split("\n");
        var state = CodeMirror.copyState(outer, cm.getTokenAt(from).state);
        var tabSize = cm.getOption("tabSize");

        var out = "";
        var lines = 0;
        var atSol = from.ch == 0;

        function newline() {
            out += "\n";
            atSol = true;
            ++lines;
        }

        for (var i = 0; i < text.length; ++i) {
            var stream = new CodeMirror.StringStream(text[i], tabSize);
            while (!stream.eol()) {
                var inner = CodeMirror.innerMode(outer, state);
                var style = outer.token(stream, state);
                var cur = stream.current();
                stream.start = stream.pos;
                if (!atSol || /\S/.test(cur)) {
                    out += cur;
                    atSol = false;
                }
                if (
                    !atSol &&
                    inner.mode.newlineAfterToken &&
                    inner.mode.newlineAfterToken(
                        style,
                        cur,
                        stream.string.slice(stream.pos) || text[i + 1] || "",
                        inner.state
                    )
                ) {
                    newline();
                }
            }
            if (!stream.pos && outer.blankLine) outer.blankLine(state);
            if (!atSol) newline();
        }

        cm.operation(function () {
            cm.replaceRange(out, from, to);
            for (
                var cur = from.line + 1, end = from.line + lines;
                cur <= end;
                ++cur
            ) {
                cm.indentLine(cur, "smart");
            }
            cm.setSelection(from, cm.getCursor(false));
        });
    });
})();
